Capture mesh-catalog at feat/r4g (2246ccc4) with the templates its manifests name and its predefined.json, and lay the copy out as a repository's root

The catalogue's manifests moved their content into template files and fall back to predefined keys, so a copy of
module.json alone no longer passes the catalogue's own check; the bus's Dockerfile is gone from the catalogue.

testdata/beside/mesh-catalog/modules/claude-code/files/claude-agent

@@ -0,0 +1,13 @@
+#!/bin/sh
+# The mesh's (module claude-code, novox/hq ADR 0266): start the agent as the account agents run as on this
+# machine. Written whole at every push: an edit here is overwritten.
+agent='${machine:agent-account}'
+if [ "$(id -un)" = "$agent" ]; then
+	exec claude "$@"
+fi
+# Another account, the operator's, becomes the agent's through its own sudo: the person is the authority. The
+# operator's override of the guard travels only when it is set in this shell, as it would reach claude.
+if [ -n "$MESH_GUARD_OVERRIDE" ]; then
+	exec sudo -iu "$agent" env MESH_GUARD_OVERRIDE="$MESH_GUARD_OVERRIDE" claude "$@"
+fi
+exec sudo -iu "$agent" claude "$@"